<template>
    <div class="about">
        <h1>{{ id? "编辑": "新建" }}分类</h1>
        <el-form label-width="120px" @submit.native.prevent="save">
            <el-form-item label="上级分类">
                <el-select v-model="model.parent">
                    <el-option v-for="item in parents" :key="item._id"
                    :label="item.name" :value="item._id"></el-option>
                </el-select>
            </el-form-item>
            <el-form-item label="名称">
                <el-input v-model="model.name"></el-input>
            </el-form-item>
            
            <el-form-item>
                <el-button type="primary" native-type="submit">保存</el-button>
            </el-form-item>
        </el-form>
    </div>
</template>

<script>
export default {
    props: {
        id: {}
    },
    data(){
        return {
            model: {},
            parents:[],
        }
    },
    methods: {
        async save(){
            let res
            if(this.id){
                res = await this.$http.put(`rest/categories/${this.id}`, this.model)
            }else{
                res = await this.$http.post('rest/categories', this.model)

            }
            this.$router.push('/categories/list')
            this.$message({
                type: 'success',
                message: '保存成功'
            })
        },
        async fetch(){
            const res = await this.$http.get(`rest/categories/${this.id}`)
            this.model = res.data
        },
        // 获取父级选项
        async fetchParents(){
            const res = await this.$http.get(`rest/categories`)
            this.parents = res.data
        },

    },
    created(){
        this.fetchParents()
        this.id && this.fetch()
    }
}
</script>

<style>

</style>